For Patients & General Readers
Polycystic Ovary Syndrome (PCOS) is a common hormonal disorder affecting women of reproductive age. It can cause irregular periods, acne, excess hair growth, and difficulty getting pregnant. PCOS is important to manage as it increases the risk of other health problems like diabetes and heart disease.
Clinical Overview
PCOS is a heterogeneous endocrine disorder characterized by hyperandrogenism, ovulatory dysfunction, and polycystic ovarian morphology on ultrasound in the absence of other specific etiologies. It represents a significant cause of infertility and is associated with increased cardiometabolic risk.
Clinical Presentation
- Irregular or absent menstrual cycles (oligomenorrhea or amenorrhea)
- Clinical or biochemical evidence of hyperandrogenism (hirsutism, acne, androgenic alopecia)
- Polycystic ovarian morphology on transvaginal ultrasound (≥12 follicles measuring 2-9 mm in diameter in each ovary and/or increased ovarian volume >10 mL)
- Infertility or subfertility
- Associated metabolic abnormalities such as insulin resistance, dyslipidemia, and obesity
Signs & Symptoms
Symptoms (Patient-Reported)
- Irregular periods, missed periods, or very light periods
- Acne, especially persistent or severe
- Excess facial or body hair (hirsutism)
- Hair thinning or loss on the scalp
- Difficulty getting pregnant (infertility)
- Weight gain or difficulty losing weight
- Patches of thickened, darkened skin (acanthosis nigricans)
Signs (Clinician-Observed)
- Hirsutism (villous hair growth in a male pattern)
- Acne vulgaris
- Androgenic alopecia
- Ovarian enlargement or multiple peripherally arranged follicles on pelvic examination (less common)
- Acanthosis nigricans
Differential Diagnoses
| Condition | Distinguishing Feature |
|---|
| Congenital Adrenal Hyperplasia (CAH) | Elevated 17-hydroxyprogesterone levels, often presents earlier in life with more severe virilization. |
| Cushing's Syndrome | Distinctive features like moon facies, buffalo hump, striae, and often a history of exogenous corticosteroid use. |
| Androgen-Secreting Tumors (Ovarian or Adrenal) | Rapid onset of virilization, significantly elevated testosterone levels, and often a palpable mass. |
| Thyroid Dysfunction (Hypothyroidism or Hyperthyroidism) | Thyroid function tests will be abnormal; menstrual irregularities can occur but other systemic symptoms are typically present. |
| Hyperprolactinemia | Elevated prolactin levels, galactorrhea, and menstrual irregularities; often associated with pituitary adenoma. |
| Premature Ovarian Insufficiency (POI) | Elevated FSH and LH levels, amenorrhea, and symptoms of estrogen deficiency; ovarian morphology typically shows fewer follicles. |
Red Flags — Seek Immediate Care
- Rapid onset of severe hirsutism or virilization, suggestive of an androgen-secreting tumor
- Amenorrhea with significant weight loss or signs of malnutrition
- Pelvic mass on examination
- Symptoms suggestive of endometrial hyperplasia or carcinoma (e.g., prolonged, heavy, or intermenstrual bleeding in older women with PCOS)
Key Investigations
- Hormonal assays: Total testosterone, SHBG, free androgen index, prolactin, TSH, FSH, LH, 17-hydroxyprogesterone (if CAH suspected)
- Pelvic ultrasound: To assess ovarian morphology (number of follicles, ovarian volume)
- Oral glucose tolerance test (OGTT) or HbA1c: To screen for insulin resistance and type 2 diabetes
- Lipid profile: To assess for dyslipidemia
- Endometrial biopsy: If persistent amenorrhea or abnormal uterine bleeding
Management Overview
Management of PCOS is individualized and focuses on addressing specific symptoms and long-term health risks. Lifestyle modifications, including diet and exercise, are cornerstone for weight management and improving insulin sensitivity. Pharmacological interventions include hormonal contraceptives for menstrual regulation and androgen reduction, and ovulation induction agents for fertility.
Disclaimer: This article is for educational purposes only and does not constitute medical advice.
Always consult a qualified healthcare professional for diagnosis and treatment.
TruelyserMD does not replace clinical judgement.